EP 1063840 A2 20001227 - Enchanced color correction
Title (en)
Enchanced color correction
Title (de)
Verbesserte Farbkorrekturschaltung
Title (fr)
Circuit de correction de couleur amélioré
Publication
Application
Priority
US 13173399 P 19990430
Abstract (en)
A method and apparatus for correcting the color of an image signal. Data in a first color space such as RGB is converted (502) to primary/secondary/combined color space by setting combined color word equal to the minimum of the input values, the primary color word equal to the maximum of the input values minus the combined color word, and the secondary color word equal to the median of the input values minus the combined color word. A set of three coefficients is selected (506) for each of the primary color word, the secondary color word, and the combined color word. The primary, secondary, and combined color words are then multiplied by the coefficients by a matrix multiplier (504) to yield color-corrected data in the first color space. <IMAGE>
IPC 1-7
IPC 8 full level
G06T 1/00 (2006.01); H04N 1/46 (2006.01); H04N 1/60 (2006.01); H04N 9/68 (2006.01)
CPC (source: EP KR US)
H04N 1/60 (2013.01 - EP KR US); H04N 1/6016 (2013.01 - EP US); H04N 9/68 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
EP 1063840 A2 20001227; EP 1063840 A3 20040721; JP 2000358252 A 20001226; KR 100703105 B1 20070405; KR 20010029676 A 20010406; TW 476217 B 20020211; US 6594387 B1 20030715
DOCDB simple family (application)
EP 00201568 A 20000502; JP 2000132429 A 20000501; KR 20000023081 A 20000429; TW 89108064 A 20000505; US 56116000 A 20000428